docs: def find_sequences(errors, epsilon):
      """Find sequences of values that are above epsilon.
  
      This is done following this steps:
  
          * create a boolean mask that indicates which value are above epsilon.
          * shift this mask by one place, filing the empty gap with a False
          * compare the shifted mask with the original one to see if there are changes.
          * Consider a sequence start any point which was true and has changed
          * Consider a sequence end any point which was false and has changed
      """
      above = pd.Series(errors > epsilon)
      shift = above.shift(1).fillna(False)
      change = above != shift
  
      index = above.index
      starts = index[above & change].tolist()
      ends = (index[~above & change] - 1).tolist()
      if len(ends) == len(starts) - 1:
          ends.append(len(above) - 1)
  
      return list(zip(starts, ends))